And can it be altered to increase image quality?
In: Technology
A book is just a bunch of letters, but what those letters are saying and how many there are says far more than just the length of the alphabet.
Image quality is simply how much data is being encoded in those bits, and how accurate it is to the real life subject. A video can be very big and have millions of pixels making each frame, or it could just be a couple thousand making it much, much smaller.
Sometimes the way you “translate” the video to bits affects things. you might want to save some space, so you compress the video and try to make it so that it throws a bit of the information away that it can recreate “well enough” later. If that compression is too conservative it might throw away information you can’t retrieve, and that makes the video look worse.
Or it just might have been shot on an old camera that didn’t provide enough information to make a better looking picture. The camera might have said “Here are enough pixels to fill a 128 by 128 screen” but then you try to view that video on a screen ten times as large: you can’t guess what pixels could go in to the empty space, so you just stretch the image and call it a day, even if it looks really bad.
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